Share-based compensation (Tables)

3 Months Ended

Mar. 31, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Components of Share-Based Compensation Expense

Components of share-based compensation expense are as follows:

	Three Months Ended March 31,
(U.S. Dollars, in thousands)	2022			2021
Cost of sales	$	211		$	178
Sales and marketing		981			717
General and administrative		3,218			2,529
Research and development		(78	)		297
Total	$	4,332		$	3,721

	Three Months Ended March 31,
(U.S. Dollars, in thousands)	2022		2021
Stock options	$	359	$	661
Time-based restricted stock awards and units		2,170		1,727
Market-based / performance-based restricted stock units		1,444		897
Stock purchase plan		359		436
Total	$	4,332	$	3,721